p PatchFirst

CVE-2026-116742

CVE-2026-116742 · HTSlib through 1.24 Heap Out-of-Bounds Write via Truncated .gzi Index Count

This page contains facts from public vulnerability sources. Check the original advisory before updating.

HTSlib through 1.24 contains a heap out-of-bounds write and read vulnerability in bgzf_index_load_hfile() in bgzf.c that allows attackers to corrupt heap memory by supplying a crafted .gzi index entry count. A count of 0xFFFFFFFF truncates noffs to zero, causing writes past a malloc(0) buffer and an offs[-1] read in bgzf_useek(), resulting in heap corruption or crashes in tools like samtools and bcftools.

CVSS 4.8 · Medium · EPSS 0.1%

Published
Updated

Stack: system

Affected products and versions

  • htslib

    Versions
    • ≥ 0, ≤ 1.24: Affected (custom)

    No fix published

  • htslib Debian:12

    Versions
    • 1.16+ds-3
    • 1.17+ds-0+exp1
    • 1.17+ds-1
    • 1.18+ds-0+exp1
    • 1.18+ds-1
    • 1.19+ds-0+exp0
    • 1.19+ds-1
    • 1.19+ds-1+exp1
    • 1.19+ds-1.1
    • 1.20+ds-1
    • 1.20+ds-2
    • 1.21+ds-0+exp1
    • 1.21+ds-0+exp2
    • 1.21+ds-1
    • 1.22.1+ds-1
    • 1.22.1+ds-2
    • 1.22.1+ds2-1
    • 1.24-1
    • 1.24-2
    • 1.24-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Debian:13

    Versions
    • 1.21+ds-1
    • 1.22.1+ds-1
    • 1.22.1+ds-2
    • 1.22.1+ds2-1
    • 1.24-1
    • 1.24-2
    • 1.24-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Debian:14

    Versions
    • 1.21+ds-1
    • 1.22.1+ds-1
    • 1.22.1+ds-2
    • 1.22.1+ds2-1
    • 1.24-1
    • 1.24-2
    • 1.24-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:Pro:14.04:LTS

    Versions
    • 0.2.0~rc3-1
    • 0.2.0~rc3-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:Pro:16.04:LTS

    Versions
    • 1.2.1-1
    • 1.2.1-2
    • 1.2.1-2ubuntu1
    • 1.2.1-2ubuntu1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:Pro:18.04:LTS

    Versions
    • 1.5-1
    • 1.5-4ubuntu1
    • 1.6-3ubuntu1
    • 1.6-4
    • 1.6-4build1
    • 1.7-2
    • 1.7-2ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:20.04:LTS

    Versions
    • 1.9-10
    • 1.9-11
    • 1.9-12
    • 1.10.2-2ubuntu1
    • 1.10.2-2ubuntu2
    • 1.10.2-3
    • 1.10.2-3ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:22.04:LTS

    Versions
    • 1.13+ds-2
    • 1.13+ds-2build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:24.04:LTS

    Versions
    • 1.17+ds-1
    • 1.18+ds-1
    • 1.19+ds-1.1build2
    • 1.19+ds-1.1build3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:26.10

    Versions
    • 1.22.1+ds2-1
    • 1.22.1+ds2-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • htslib Ubuntu:26.04:LTS

    Versions
    • 1.21+ds-1
    • 1.22.1+ds2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →